Multigenerational Homes in Canada: Financial and Legal Considerations (2026)
Updated
Multigenerational living is growing fast in Canada, driven by housing affordability challenges and the desire to keep aging parents close. When it works, it’s one of the most financially powerful housing arrangements available: shared mortgage payments, built-in childcare, reduced elder care costs, and pooled resources for a better property than anyone could afford alone. The federal government now supports this with the Multigenerational Home Renovation Tax Credit (up to $7,500), CMHC’s extended 30-year amortization for secondary suites, and provincial grant programs worth up to $40,000 in BC. The key to success is getting the legal structure and written agreements right before you move in.
Multigenerational Home Renovation Tax Credit (MHRTC)
The MHRTC is a refundable federal tax credit that covers 15% of up to $50,000 in eligible renovation expenses to add a self-contained secondary dwelling for a senior (65+) or adult with a disability. That’s up to $7,500 back, even if you have no tax owing. The secondary unit must have its own private entrance, kitchen, and bathroom facilities. This credit can be combined with provincial programs (like BC’s $40,000 forgivable loan) for significant financial support. Keep all receipts and hire licensed contractors — your own labour doesn’t qualify.
Eligibility
Requirement
Details
Qualifying individual
Senior (65+) or adult (18+) with disability
Relationship
Parent, grandparent, child, grandchild, sibling
Purpose
Create self-contained secondary dwelling
Secondary dwelling
Private entrance, kitchen, bathroom facilities
Credit Calculation
Factor
Amount
Eligible expenses
Up to $50,000
Credit rate
15%
Maximum credit
$7,500
Refundable
Yes (can get refund even if no tax owing)
Eligible Expenses
Eligible
Not Eligible
Construction labour
Furniture and appliances
Building permits
Annual, recurring costs
Architect fees
Maintenance costs
Materials
Work on main dwelling
Modifications for accessibility
Cleaning services
Legal Structures
Getting the ownership structure right is critical for multigenerational homes. Joint tenancy means the property passes automatically to the surviving owner, which works well for spouses but may not suit parent-child arrangements where you want unequal shares or specific estate planning. Tenants in common allows unequal ownership and passes each person’s share through their estate. Whichever structure you choose, get a co-ownership agreement that covers contribution amounts, responsibilities, exit strategies, and what happens if someone wants out. A few thousand dollars in legal fees now prevents catastrophic family disputes later.
Multigenerational living can reduce housing costs by 20–40% while keeping family close, and government programs now provide meaningful financial support. Get a co-ownership agreement, plan your tax structure (rent-free vs. charging rent), and take advantage of the MHRTC and provincial grants to offset renovation costs.